Retired Olympian Melissa Hoskins was struck by a vehicle
                                
                                
                                    (Newser) -
                                    Melissa Hoskins, an Australian two-time Olympic track cyclist and former world champion, was killed Saturday night when she was struck by a vehicle in Adelaide. Her husband, Rohan Dennis, has been charged in the case,  ABC Australia  reports. Hoskins, 32, set a world record in 2015 as part of Australia'...